Roadbed construction



Feb. 4,1930. w. P. DAY 1,745,746

ROADBED CONS TRUCTION Fi1ed Ju1y 15, 1929 2 sheets-sheet 2 Patentedy Feb. 1930 PATENT oi-FICE i WILLIAM?. DIAY, OF CLEVELAND HEIGHTS, OHIO y Appiication med 4my' 15,

10 described in which the rails are supported `upon `alower layer or foundation ofk concrete which" is providedy with 'drain openings to permit'the water' to drainl away from the kbases of therails;

- A further object' ofl the invention is to provideyajfroadbed construction of the character r:described"which consists of a foundation l.of Hconcrete provided-withf'sui'table drain openings for drainingthewateraway from :the

'20 railbases and in vwhichthe upper portion of the roadbed .is formed offa layer of material which is readily removable to'permit they rails to lbel replaced or repaired. K f .A'further object'V fthe inventionistd projvide `a roadbedfconstruction in A'which the bases of the rails i are covered with .a Iwaterproofing material which tends to direct the water away from the-rails and into. .suitable `drain openings. E

v vV yAzstillfurtherobiect "of the invention isto rovidearoadbed `construction, of the char- Y acter described which isprov'idedivvith Vaj ceny trally disposed'drain orrdrainconduit which is disposed between the rails and frornwhich lead'rbranch drain conduits leading'to'points adjacent the -basesfof the rails and along each side thereof. Y v "Astill further. object of the inventionisito provide a roadbedy constructionof the char- .'40, 'acter described which consists of a concrete kfoundation on which are ysupported steel ties of the twin type which'are so arranged as to ypermit the material under the rail/plates to be retamp'ed when l'necessary or desired yand infwhich the upper'layer of'roadfformingima terial is readily 'removable to; permit access to; theV rails ,or the removal 'of' the same.

Further-@and morelimited objects of the f invention will appear ras-the description proceedsand Jbyrfreferencerto. the accompanying 1929 .Serial 110,378,232.

drawings 'which Fig. 1`is.a vertical ksectional view disclosing the preferred form of roadbed kconstruction Fig. 2 isa vertical sectionalV viewon'rthe line 2-2 of Fig. l; Fig. 3 is a vertical sectional View disclosing thefties arranged within thev trench` with the railssupported thereonbefore the foundation is laid; and Fig. 4 is a top planview illustrating the preferred type of tie whichfis to be used with this construction. r

' Referring'now to the drawings, reference character 1 designates thebottom layer of concretewhich will be referred to as the foundation. Disposed below the foundation and 'between the rails is av drain conduit 2 which extends longitudinally .of the track andparallel therewith. Arranged at intervals about three 'feet apart and extending across the roadbed are trenches 3 from which lead branches 4, 4a and 5, 5a. The trenches 3 and the branches 4, 41a and, 5a rare .filled with gravel, stone, cinders or other suitable materialadapted to permit water to drain therethrough and into the main drain conduit 2 which is preferably formed of drain tile.

Supported upon'the foundation 1 are ties 6 which arepreferably made 0f steel and are of the 4twin type. The ties consist essentially of rail plates 7 and 8 which are connected by cross bars-9 and 10. The rail plates are provided with oppositelyl disposed pairs of T- shaped openingsyll and 12 which are adapted to receive tie lclamps for securing the rails in place...` f

Theties are supported on the foundation 1 infsuchpositionthat the cross beams '9 and l()y 'are partially embedded therein. The foundation is first laid with the rails supportedinthe position shown in Fig. 1 a-nd the concrete is allowed to harden and set.

The spaces beneath the rail plates 7 and 8 are then filled with a. waterproof materialknown as bituminous concrete which consists essentially of lslag and crudeasphaltin approximately the following proportions:

3 parts fine slag.

,2 partsy coarse slag.

1 part crude asphalt.

The rails 13 land 14 are first' securedvto the rail yplatesloy means ofsuitabie tie clamps.

The rail plates and the lower portions of the rails are then covered with a layer 15 of bituminous concrete and this layer of material extends between the rails as shown most clearly in Fig. 1. This material extends substantially all the way to the tops of the rails and is inclined toward the drain openings as shown most clearly in Fig. 1 so thaty any water which may seep in adjacent the rails will be deflected into the drain openings hereinbefore described; After` this layer 4of material 15 has set, a second layer of concrete 16 may be applied up to about the level shown inl Fig. 1. After this layer of material has set a top layer 17 of surface material is applied and may consist of asphalt or any other 'suitable material. Y i According to theV preferred manner of forming the roadbed construction hereinbefore described I Vfirst provide atrench of suitable depth and which is slightly wider than the track. I then lplace between the track and adjacent the bottom of the trench a main drain conduit 2 which is preferably formed of drain tile. Suitable forms are then inserted to provide the trenches 3 and the branch drain openings 4, 4EL and 5, 5a, lead- ,ing to points adjacent the opposite edges of the rails. The ties are then arranged in place and supported on suitableblocks and rails secured thereto in a manner well known to those skilled in the art. The lowermost layer or foundation 1 of concrete is then poured ina manner well known to those skilled in the art andallowed to harden and Y set. The spaces beneath the railplates are then lled with bituminous. asphalt and tamped in place inl any suitable manner. The railplates and the bases of the rails are then covered 'with a layer of bituminous concrete 15 which extends upwardly to a point near the tops of the rails. This material is allowed to'set and the layerjof concrete 16 is then applied as shown most clearly in Fig. 1 and allowed to harden and set. The layer of surface material 16 is then applied in any suitable manner, Y g

, -By referring to the drawings, it will be seen that the branch drain conduits 4,4? and 5, 5a extend through the layer of bituminous asphalt and terminate at points adjacent the rails and also adjacent the rail plates. These drain openings are preferably about three feet apart and extend along both sides of the rails. It will now be clear that any water which may seep in along the heads of the rails will strike the layer of bituminous concrete whichfis waterproof and be deflected into the branch drain openings 4, 4a and 5, 5a and drain through the trench 3 into themain drain conduit 2.

It will also be clear thatv the upper layers of material, including the layer of bituminous concrete, may be removed down to the foundation without disturbing the rails so as to permit removal or replacement of the track without disturbing the foundation. With this construction I am enabled to practically prevent any water from seeping in around the bases of the rails or underthe rail plates.

Various changes may be made in the manner of assembling and arranging the various parts, without departing'from the spirit of theY invention. My invention is also not limited to any particulartype of road form? ing 'material either'for the foundation or .forv theupperfmost layers. While I have in this specification used the term .concrete it is to be understood that Ido not intend by this to limit the invention to any specific mixture of material but rather to use the term generically as embracing all ofthat class of materials in which a suitable bonding material such as cement or asphalt is'used in connection with gravel, stone or sand. It is there-. fore to be understood that the invention is limited only'in accordance with the scope of the appended claims.,A l

Having thus described myy invention, what Iclaimis:-` l l 1. vIn a roadbed construction forrailways, a concrete foundation, a plurality ofcross ties supported by 4said foundation, rails se.- cured to said ties, a waterproof material cov# ering said ties and all ofthe :railsexcept the head portions thereof,.a layer of concrete coveringsaid layer of waterproof material and a layer'of surface material-covering said last. mentionedlayer of concrete. l 2.` In a roadbed construction for railways, a concrete foundation, a plurality of crossk ties supported onjsaid foundation, rails secured to said ties, a waterproof material cov-` ering said ties and allof the rails-,except the head portions thereof, road forming material covering said layerfof waterproof material substantially up to the level of the heads of the rails, adrainfconduit Ydisposed between said rails and a plurality of branch drainV conduits leading from points Vadjacent the rails and adapted to deliverinto said drain conduit, said branch drain conduits extending1 through saidlayer of waterproof materia j3. Ina roadbed construction for railways, a concretefoundation, a plurality of cross ties supported on said foundation, a layer of waterproof material covering saidfoundation and all of the railsexcept the head portions thereof, road forming material covering said layer of waterproof material, a drain conduit disposed between said rails and a pluralityV of branch drain conduits' leading from points adjacent the rails-and adapted to deliverinto said first mentioned conduit, said branch drain conduits extending through said layer of waterproof materiahsaid layer of water# proof material consistingof bituminous concrete and being disposed so vas to deflect the water into saidy branch drain conduits.

' foundation, a plurality o 4. A roadbed construction for street or boulevard railways comprising a concrete ties supported on said foundation, rails secured to said ties, a layer of waterproof material covering the tiesand extending upwardly about the rails to a point'adj acent the head portions thereof, a main drain conduit disposed between said rails, branch drain conduits leading from said main drain conduit and terminating adjacent i said rails, said branch drain conduits extending through said layer ofwaterproofmaten rial and adapted to drain water away from said rails and road forming material filling the space between and along said rails.

5. roadbed construction for street or boulevard railways comprising a concrete foundation, a plurality of ties supported on s-aidffoundation, rails secured to said ties, a

layer of bituminous concrete covering said ties andextending upwardly about said rails to a point adjacent the head portions thereof,

'a main drain conduit, branch drain conduits leading from said main drain conduit and terminating adjacent said rails, road forming material lling the space between and along said rails, said branch drain conduits extending through said layer of bituminous concrete and terminating adjacent said rails.

6. A roadbed construction for street or boulevard railways comprising a concrete foundation, a plurality of steel twin ties supported fon said foundation and partially embedded therein," said ties having rail plates which are disposed in a plane above said foundation, a pair of rails secured to said rail plates respectively, a waterproof material covering said ties and disposed beneath said rail plates and extending upwardly about said rails to a pointadjacent the head portions thereof a main drain conduit extending parallel with the track and having aplurality of branch drain conduits leading therefrom and terminating adjacent said rails, said branch conduits extending through said layer of waterproof'material and serving to drain j water away from said rails into said main drain conduit and one or more layers of road formingv material filling the space between and along said rails.

l7. A roadbed construction for street or boulevard railways as set forth in claim 6 in which said waterproof material consists of bituminous concrete.

8. A roadbed construction for street or boulevard railways comprising a concrete foundation, a plurality of steel ties of the twin type supported by said foundation, a pair of rails supported o n said ties, said ties having rail plates which are disposed in a plane above said foundation, waterproof material filling ythe space beneath Vsaid rail plates and a layer of waterproof material covering said ties and rail plates and yextending upwardly about said rails to a point adjacent the head Vpor-y signature.

WILLIAM P. DAY.

llO 

